Preparation of Polypropylene Foaming Materials by Electron-Beam Irradiation

Polypropylene sheet was irradiated with electron-beam to cause crosslinking and subsequently heated to foam.The effects of sensitizer content,the blowing agent content and irradiation dosage on the tensile strength of the sample were studied.The optimal technological parameters obtained by orthogonal experiments.The effects of sensitizer content,the blowing agent content and irradiation dosage on the crosslinking degree of the sample were analyzed.Results showed when sensitizer content matched radiation dose,the appropriate crosslinking degree of the system was reached,and at the same time the foam materials with high magnification and uniform size pore were received.